The HMC421QS16 from Analog Devices is a RF Mixer with RF Frequency 1.4 to 2.3 GHz, LO Frequency 1.7 to 2.25 GHz, IF Frequency 0.05 to 0.3 GHz, Conversion Gain 9 dB, LO Drive - Power 10 dBm. Tags: Surface Mount, Down-Conversion Mixer. More details for HMC421QS16 can be seen below.